java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:00:13,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:00:13,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:00:13,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:00:13,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 17:00:13,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 17:00:13,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 17:00:13,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 17:00:13,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 17:00:13,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 17:00:13,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 17:00:13,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 17:00:13,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 17:00:13,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 17:00:13,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 17:00:13,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 17:00:13,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 17:00:13,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 17:00:13,310 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:00:13,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:00:13,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:00:13,313 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:00:13,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:00:13,314 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:00:13,314 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:00:13,314 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:00:13,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:00:13,315 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:00:13,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:00:13,317 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:00:13,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:00:13,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:00:13,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:00:13,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:00:13,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:00:13,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:00:13,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:00:13,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:00:13,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:00:13,320 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:00:13,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:00:13,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:00:13,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:00:13,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:00:13,321 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:00:13,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:00:13,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:00:13,322 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:00:13,358 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:00:13,369 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:00:13,372 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:00:13,374 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:00:13,374 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:00:13,375 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label41.c [2019-10-02 17:00:13,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d785f065c/25f9a88255e141ec87d9fb6f3eed6367/FLAG013ca6ae6 [2019-10-02 17:00:14,074 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:00:14,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label41.c [2019-10-02 17:00:14,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d785f065c/25f9a88255e141ec87d9fb6f3eed6367/FLAG013ca6ae6 [2019-10-02 17:00:14,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d785f065c/25f9a88255e141ec87d9fb6f3eed6367 [2019-10-02 17:00:14,284 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:00:14,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:00:14,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:00:14,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:00:14,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:00:14,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:00:14" (1/1) ... [2019-10-02 17:00:14,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a499990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:14, skipping insertion in model container [2019-10-02 17:00:14,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:00:14" (1/1) ... [2019-10-02 17:00:14,303 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:00:14,358 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:00:14,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:00:14,908 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:00:15,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:00:15,027 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:00:15,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15 WrapperNode [2019-10-02 17:00:15,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:00:15,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:00:15,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:00:15,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:00:15,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (1/1) ... [2019-10-02 17:00:15,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (1/1) ... [2019-10-02 17:00:15,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (1/1) ... [2019-10-02 17:00:15,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (1/1) ... [2019-10-02 17:00:15,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (1/1) ... [2019-10-02 17:00:15,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (1/1) ... [2019-10-02 17:00:15,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (1/1) ... [2019-10-02 17:00:15,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:00:15,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:00:15,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:00:15,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:00:15,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:00:15,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:00:15,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:00:15,235 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:00:15,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:00:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:00:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:00:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:00:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:00:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:00:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:00:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:00:16,610 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:00:16,611 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:00:16,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:00:16 BoogieIcfgContainer [2019-10-02 17:00:16,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:00:16,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:00:16,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:00:16,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:00:16,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:00:14" (1/3) ... [2019-10-02 17:00:16,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a23413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:00:16, skipping insertion in model container [2019-10-02 17:00:16,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:15" (2/3) ... [2019-10-02 17:00:16,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a23413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:00:16, skipping insertion in model container [2019-10-02 17:00:16,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:00:16" (3/3) ... [2019-10-02 17:00:16,625 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label41.c [2019-10-02 17:00:16,637 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:00:16,647 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:00:16,667 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:00:16,707 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:00:16,708 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:00:16,709 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:00:16,709 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:00:16,709 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:00:16,709 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:00:16,710 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:00:16,710 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:00:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 17:00:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-02 17:00:16,762 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:16,763 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:16,765 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:16,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1692915649, now seen corresponding path program 1 times [2019-10-02 17:00:16,773 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:16,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:16,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:16,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:16,822 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:17,211 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:17,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:00:17,212 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:17,218 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:00:17,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:00:17,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:17,237 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 17:00:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:18,242 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2019-10-02 17:00:18,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:00:18,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2019-10-02 17:00:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:18,264 INFO L225 Difference]: With dead ends: 346 [2019-10-02 17:00:18,265 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 17:00:18,266 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 17:00:18,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 17:00:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 17:00:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-02 17:00:18,341 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 91 [2019-10-02 17:00:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:18,342 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-02 17:00:18,342 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:00:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-02 17:00:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-02 17:00:18,347 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:18,348 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:18,348 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1768869960, now seen corresponding path program 1 times [2019-10-02 17:00:18,349 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:18,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:18,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:18,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:18,351 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:18,480 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:18,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:00:18,481 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:18,483 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:00:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:00:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:00:18,485 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-02 17:00:19,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:19,317 INFO L93 Difference]: Finished difference Result 431 states and 612 transitions. [2019-10-02 17:00:19,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:00:19,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-02 17:00:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:19,324 INFO L225 Difference]: With dead ends: 431 [2019-10-02 17:00:19,324 INFO L226 Difference]: Without dead ends: 431 [2019-10-02 17:00:19,325 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:00:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-02 17:00:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-02 17:00:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-02 17:00:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-02 17:00:19,364 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 101 [2019-10-02 17:00:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:19,364 INFO L475 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-02 17:00:19,364 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:00:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-02 17:00:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-02 17:00:19,370 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:19,371 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:19,371 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:19,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1027824070, now seen corresponding path program 1 times [2019-10-02 17:00:19,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:19,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:19,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:19,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:19,374 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:19,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:19,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:00:19,547 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:19,548 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:00:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:00:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:19,549 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-10-02 17:00:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:20,109 INFO L93 Difference]: Finished difference Result 828 states and 1140 transitions. [2019-10-02 17:00:20,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:00:20,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2019-10-02 17:00:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:20,117 INFO L225 Difference]: With dead ends: 828 [2019-10-02 17:00:20,117 INFO L226 Difference]: Without dead ends: 828 [2019-10-02 17:00:20,118 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-02 17:00:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-02 17:00:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-02 17:00:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1140 transitions. [2019-10-02 17:00:20,167 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1140 transitions. Word has length 102 [2019-10-02 17:00:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:20,170 INFO L475 AbstractCegarLoop]: Abstraction has 828 states and 1140 transitions. [2019-10-02 17:00:20,170 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:00:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1140 transitions. [2019-10-02 17:00:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-02 17:00:20,175 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:20,175 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:20,176 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:20,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1016446174, now seen corresponding path program 1 times [2019-10-02 17:00:20,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:20,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:20,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:20,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:20,178 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:20,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:20,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:00:20,293 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:20,294 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:00:20,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:00:20,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:00:20,295 INFO L87 Difference]: Start difference. First operand 828 states and 1140 transitions. Second operand 6 states. [2019-10-02 17:00:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:21,085 INFO L93 Difference]: Finished difference Result 1428 states and 1972 transitions. [2019-10-02 17:00:21,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:00:21,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2019-10-02 17:00:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:21,097 INFO L225 Difference]: With dead ends: 1428 [2019-10-02 17:00:21,097 INFO L226 Difference]: Without dead ends: 1428 [2019-10-02 17:00:21,098 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:00:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2019-10-02 17:00:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1400. [2019-10-02 17:00:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2019-10-02 17:00:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1852 transitions. [2019-10-02 17:00:21,179 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1852 transitions. Word has length 116 [2019-10-02 17:00:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:21,179 INFO L475 AbstractCegarLoop]: Abstraction has 1400 states and 1852 transitions. [2019-10-02 17:00:21,179 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:00:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1852 transitions. [2019-10-02 17:00:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-02 17:00:21,188 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:21,189 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:21,189 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1605716217, now seen corresponding path program 1 times [2019-10-02 17:00:21,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:21,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:21,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:21,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:21,192 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:21,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:00:21,338 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:00:21,339 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 134 with the following transitions: [2019-10-02 17:00:21,342 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [66], [70], [74], [78], [82], [86], [90], [94], [97], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 17:00:21,397 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:00:21,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)